Genuine OEM Volkswagen Coolant Hose, part number 7E0121086R. This hose is a vital component of the engine cooling system, responsible for circulating coolant between various components like the radiator and engine. Its specific routing and material are designed to withstand high temperatures and pressures. Weighing approximately 0.1 kg. Using a genuine OEM coolant hose ensures the correct material composition for heat and chemical resistance, precise molded shape for proper routing without kinking, and secure connections to prevent leaks and maintain cooling efficiency.